But Denny, the UK Department of Trade and Industry (DTI), now called BER (don't know what that stands for), told me that collecting certificates of compliance is insufficient to show "due diligence" (how I hate that term!). When I asked how much testing was required to show this diligence, they told me, "The courts will decide." Since we don't want to be the guinea pig, we do a LOT of testing.
Bev
RIM
From: Dennis Fritz [mailto:[log in to unmask]]
Sent: Friday, September 17, 2010 9:08 AM
To: [log in to unmask]; Bev Christian
Subject: Re: [TN] 'certification' to RoHS
Bev very nicely outlines the test methods for each of the constituents of the circuit board (bare).
The other approach is to accumulate certifications from the suppliers of the constituent parts - the laminate, the foil copper, the mask, the surface finish, and finally from the fab shop that plated the copper. IPC 1752 gives a format for accumulating constituent component data. The 1752 approach is more practical when certifying an assembled board, and probably will be more reasonable when customers ask for certification to REACh, as that lists more and more substances that are restricted. Who knows where the blending of RoHS and REACh will end up.
Denny Fritz
SAIC, Inc
-----Original Message-----
From: Bev Christian <[log in to unmask]>
To: TechNet <[log in to unmask]>
Sent: Fri, Sep 17, 2010 8:31 am
Subject: Re: [TN] 'certification' to RoHS
Louis,
Not sure what your definition of certified is, but a circuit board consists of:
Epoxy
Copper
Glass fibers
Solder mask
Surface finish (and possibly intermediate layer diffusion control metal layer)
So, does the epoxy consist of one of the two banned families of brominated fire
retardants (BFRs)? Unlikely.
Is the copper contaminated with mercury or lead or cadmium? Unlikely. I
presume you are not making electronics for the US NAVY where an old contract
might call for cadmium in some instances because of its anti-corrosion
characteristics.
Are the glass fibers going to be contaminated with
Mercury - unlikely
Cadmium - unlikely
Cr(VI) - unlikely
Lead - possibly, but it would be exempt anyway
Solder mask - of all the RoHS substances the BRFs would be the most likely, but
extremely unlikely.
Surface finish - not in iSn, iAg, ENIG, ENERPIG, OSP, but it that REALLY lead
free HASL you received? :)
So use XRF and look for Cd, Hg, Pb, Cr and Br. The latter is the one that will
cost you the most to test for, IF you are buying FR4, since a hefty portion of
the total weight of the board comes from tetrabromobisphenol A (NOT restricted -
yet). If you have halogen free boards, then you shouldn't find any.
Bev
RIM
-----Original Message-----
From: TechNet [mailto:[log in to unmask]<mailto:[log in to unmask]>] On Behalf Of Louis Hart
Sent: Friday, September 17, 2010 8:15 AM
To: [log in to unmask]<mailto:[log in to unmask]>
Subject: [TN] 'certification' to RoHS
Technetters, I've noticed many discussions of RoHS and compliance on this forum
over the years. A question came up here yesterday, an answer to which I
volunteered to attempt to obtain.
Is it possible to certify an unpopulated printed circuit board as RoHS
compliant? My understanding is that a board's constituent materials, as they
come from a supplier, can be so certified.
Louis Hart
Compunetics
Monroeville, PA
USA
[log in to unmask]<mailto:[log in to unmask]><mailto:[log in to unmask]<mailto:[log in to unmask]>>
412-858-1272
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